I know nothing except the fact of my ignorance.

I know that I know nothing.

Not life, but good life, is to be chiefly valued." "It is not living that matters, but living rightly. The unexamined life is not worth living.

Do not go through life like leaf blown from here to there believing whatever you are told.

To fear death, gentlemen, is no other than to think oneself wise when one is not, to think one knows what one does not know.

The years wrinkle our skin, but lack of enthusiasm wrinkles our soul.

To fear death is nothing other than to think oneself wise when one is not. For it is to think one knows what one does not know. No one knows whether death may not even turn out to be the greatest blessings of human beings. And yet people fear it as if they knew for certain it is the greatest evil.